Automatic stopping device for printing presses and paper-folding machines



May 21, 1929. R o. HOLT 1,713,757

AUTOMATIC STOPPING .DEVICE FOR PRINTING PRESSES AND PAPER FOLDINGMACHINES Original Filed Deo. 22, 1926 INVENTOR ATTORNEY Patented May 21,1929.

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RALPH O. HOLT, OF PRINCESS BAY, NEW YORK, ASSGNOR OF FO-RTY PER CENT TOHENRY C. FAHREII'KR'UG, 01T BROOKLYN, NEW YORK.

AUTOMATIC STOPPING DEVICE FOR PBINTNG PRESSES AND PAPER-FOLDING MACHNES.

Application filed. December This invention relates generally to printingpresses and folding machines, and has more particular reference to anautomatic stop device therefor.

'l'he invention has for an object the provision of an improved automaticstop dev icc for printing and folding machines which will act to stopthe machine if the sheets of paper being printed or folded jam, or donot feed properly.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying d 'aw1ng, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

Referring to the drawing forming a. material part of this disclosure :jt

Fig. 1 is a side elevational view of a printing press with the inventiondevice applied thereto.

Fig. 2 is a fragmentary enlarged view of a portion of the device shownin Fig. 1.

Fig. 3 is a plan view thereof.

Fig. 4 is a fragmentary enlarged view of another portion of the deviceshown in Fig. 1,

Fig. 5 is a vertical sectional view taken on the line 5-5 of Fig. 4.

Fig. 6 is au enlarged view of another portion of the device shown inFig. 1, namely the switch box with its cover opened, disclosing theinterior thereof.

Fi 7 is a vertical sectional view taken on the line 7-7 of Fig. 6, whenthe circuitbreaker is in open position. Y

Fig. S is a schematic wiring diagram of the device.

rlhe reference numeral 10 indicates the f 'ame of a printing machine,havingl a type frame 11 slidably mounted thereon, and moved backwardsandV forwards by an arm 12 pivoted intermediate of its ends to the frame10. as at 13, and connected at its upper end to the type frame 1l..Tension spring;- lllis connected between the lower end of the arm 12 andthe frame 10. Mounted on the frame l() is an electric motor 15 connectedby belt 16 guided by idler 17, to a wheel 18 having coaxially securedthereto a gear 19, meshing `with another gear 20 provided with aneccentrically mounted connecting rodV 21 engaged at one end to the arm12 to oscill te the arm ifiitainng t ie :tarward and l ard :atletica1926, Serial No. MSK-.41.

23 to between the cylinder 22 and the type frame, and thereafter to 23a.The ends 27 of inking rolls are illustrated, but the detail operationthereof is not shown.

The feeding mechanism 26 tilts upwardly toward the delivery table andwill feed only a predetermined number of sheets to the said .table aswill hereafter be pointed out. The

said feeding mechanism is formed with several .conveying belts 28 whichcarry the sheets 23.

ldeneath these belts a rod 29 is supported, and electrically grounded tothe frame 10 as indicated at 30. Suitably supported to the frame 10 is ahracl-:et 31 of insulation material, having a projecting pintle pin 32electrically connected to binding post 33, and pivotally supporting aspring metal contact arm 34 intermediate of its length. This contact armis of such length and shape that one end is engageable with rod 29,normally urged into engagement by the weight of an attached. projectinfTstud 35, and weights applied. thereon, not shown on the drawing, whilethe other end of the contact arm 34 contacts with a stationary contactarm 86 supported by bracket 31 and electrically connected to terminal37. lf a sheet 23 is passing over rod 29 the contact arm 34 is insulatedtherefrom, otherwise it contacts therewith. The contact arm 34. makescontact with the stationary arm 36 every time a sheet passes between thesaid arm 84 and the rod 29 but the electrical circuit is not completedas will hereinafter be explained.

Pivotallv connected to the arm 12 is one end of a link 38, pivotallyconnected at its other end to a lever 39 projecting from roller -10 onshaft 11 mounted in frame 25. Screw 4-2 also projects from the roller40, and is electrically connected thereto, the roller being Igroundedindicated at 43 to the frame 25 which Ielectrically connected to frame10 by Cil niay be kengaged by the action et screw 42 abutting againstthe contact arm 56.` The link 33, lever 39, and screw l 2 are soarranged .that when a natural space between the sheets 23 passing overrod 29 occurs, and thecontact arm 34 contacts .with the rod 29, thescrew 42 will be between 45 and 50 but not connecting with either oneot' these. As the type :frame and its actuating arm 12 which operatesthe roller 4G and setscrew 42 will at this time be somewhere between thetwo extremes of its movement, contact between the screw 42 and eitherthe arm 45 orarm 50 is only possible at such extreme points. As the typetrame 12 moves to the right, the screw 42 moves te about 50, whichcauses arms 49 and 51 to engage. The arm 56 is insulated Yli'om the arm49 by the insulation members 54.

Mounted on the 'trame 16 is a switch box 55 having a cover 56. `Fastenedte the bottom ot the box 55 is an insulation block 57 suiiipore n ing apair ot fuses '53, each tusebeing con'- nec-,ted at one end to terminals59, 60, and at the other end to a circuit breaker comprising V'pivotedmountec knives 61, 62, engageable with knife slots 63, 6,4 connected toterminals 65, 66. Connecting the knives 61, 62 isa bridge 67 oiinsulation material. A link 63 is pivotally engaged to the bridge 67,and is termed with an elongated aperture 69 at its front end. AEngagedin this aperture 69 is i Vcrank lever 70 pivotedas at 7l in the sides oithe box 55 and toi-ined atone end withv a projecting handle 72.VNormally holding the crank 7 O inthe position shown in Fig. 7, that iswith the knives 6l, 62, disengaged `lroin 'f slots 63, 64, is a tensionspring 73 acting be- ,tween 7G and the box lrlnother tension spring 74acts between the crank 76 and the bridge67-to normally keep thecrank 7 Oin that end ol aperture 69 as shown iii Fig. 7.

y A catch 75 projcc'tstroin the bridge 67, and

is enOaOeable with a comilemeiitarv catch .6 on an yarinature ,769 pivoted at i 6. liVhen these catches engage each other, as shown in 63 64.B turning the handle (2A in the 7 v s h propel' direction, the crank i()pressesagainst the end ot slot 69- oii' link 68, lorcing the bridge 67into such position that the knives engage the knife slots, and thecatches engage each other holding the bridge in this position.

Mounted above catch 76 is solenoid 77.

rlhe terminal 33 is connected to the positive terminal of battery 7 8and the negative teiminal of the battery is connected to the single poleswitch 79 fastened on the side of box 55. From switch 79 a wire 80 leadsto terminal 31 of a'contact arm 32 engageable byanother contact arm 83having a terminal 84. A lead connects terminal 34 with the solenoid 77.I

minals 59, 60 and some source of power, not `shown on the drawing.'llermiiials 65, 66 are connected to the motor 15, not shown on thedrawing. rlhe operation et the device is as follows: 7

Handle 72 is turned to engage the catches 75, 76, closiiig'tlie knives6l, and also contact arms 32, Next switch 79 is opened, and thereafterswitch 66 is closed which causes motor 15 to operate, and the printingmachine is set in motion. Next the feeding mechanism is set in motion bycertain control levers not shown on the drawing. f heswiteh 79 isclosed. Each 'passingsheet`ofpaper 23 insulates bai 29 from arm 34, butthere is a.

certain space between the passing sheets and during this period,.one endot 34 contacts with 29., and as betere explained simultane-v ously screw42 isA passing between 45 and 50 bnt connecting with neither.

lt anything should happen mechanism vand the sheets 23 no longer pass29, then contact arm 34 will continuously contact with 29, and the nexttime screw 42 contacts Vwith arm 45 a. closed circuit will existbetween. grounds 30, 43, bar 29, arm 34, terminal 33, battery 7 3,switch'79, contacts82, 83, the solenoid77`, terminal 46 and arm 45.yljhe' solenoidV will be energized, litting armature 7 6hl anddisengagmg catch 76, and catch 75, and permitting spring 73 to swingbridge 67 'to open position, which open knives 61, 62 from the knifeslots 63, 64, breaking the circuitofmotor 15 and stopping the printingmachine. i 85 releases the arms 32, 634 allowing them to break thecircuit containing battery 78, so

lthat the battery will not be needlessly exhausted.

. lf for any reason'tlie sheet was to remain between the contact arm 34and the rod 29 long enough for the aim 12 to reach the extreme et itsrearward movement. then the setscrew 42 would cause arms 49 and 51 tocontact, thus closing the circuit through arm 34,

arm 36, lead 85, terminal 52, arm 51, arm 49, terminal 47, lead 48,terminal 46 to solenoid 77, arms 82 and 83, lead 80, switch 49,'battery73, terminal 33.

While l have illustrated and 'described my As the bridge opens, thescrew."

s u 100 to the'feeding` un A invention with some degree ofparticularity, ,l realize that in practice various alterations thereinmay be made. I therefore reserve the right and privilege of changing theform of the details of construction or otherwise altering the relationof the correlated parts without departingfroin the spirit or the scopeof the appended. claims.

Having thus described my invention, what I claim as new and desire tosecure by United States Letters Patent is z- 1. An automatic stop devicefor printing machines and other machines having a paper feeding);device, comprising a. contact rod, a

pivoted contact arm. one end of the arm been gageable with the rod, astationary contact arm engageable with the other end of the pivotedcontact arm, the rod and pivoted arm being adapted to allow feed paperto pass therebetween, and the feeding paper to contact the pivoted armwith the stationary one, circuit closing means., a circuit breakeractuated by the said circuit closing means for stopping the machine iffeed paper is not between the rod and pivoted arm, means for preventing`the action of said circuit clocing means at such time when naturallyfeed paper does not pass between the rod and pivoted arm, and meanspermitting the opera tion of the said circuit closingmeans when thepivoted and stationary arms contact.

Q. A stop mechanism for a paper sheet feeding machine having an illatingmember in cooperative relation with the feeding mechanism, the said stopmechanism comprising a roller rotatably mounted on the, machine, anextension on the rollerl` means for connectting the roller to the oscillati ng member, a plurality of electrical circuit makers operated by theextension, a circuit maker and breaker operated by the sheet, and acircuit breaker operated by the aforementioned circuit makers andbreaker to stop the machine when there is an interruption in the feed ofthe paper.

8. A stop mechanism for a paper sheet feeding machine having anoscillating` member in Vcooperative relation with the feedingn'iochanism, the said stop mechanism comprising a roller rotatablymounted on the machine, an extension on the roller, means for connectingthe roller to the oscillating member, a plurality of electrical circuitmakers operated by the extension, a circuit maker and breaker operatedby the sheet, and a circuit breaker operated by the aforementionedcircuit makers and breaker to stop the machine when the paper is beingjammed.

4. A stop mechanism for a paper sheet feeding machine having anoscillating member in cooperative relation with the feeding mechanism,means for stopping the machine if there is an interruption in thefeeding of the paper, said means including a rod electrically grounded,an arm pivotally mounted on the machine normally in the path of thepaper and in contact with the rod when there is no paper feeding,several circuit makers operatively connected to the oscillating member,and a circuit breaker adapted to break the circuit when the oscillatingmember actuates the aforen'ientioned circuit makers while there is nopaper feeding and the pivoted arm is in contact with the rod.

5. A stop mechanism for a paper sheet feeding machine having anoscillating member in cooperative relation with the feeding mechanism,means for stopping the machine when the paper is jamming, said meansincluding a rod electrically grounded, an arm pivoted intermediate itsends, a fixed contact arm in engagement with the pivoted arm when asheet of paper is jamming between the said arm and rod; a plu 1ality ofcircuit makers operated by the oscillating member and a circuit breakerenergized by the circuit makers to stop the machine when the paper is inthe above mentioned position.

6. A stop device for printing and other paper feeding machines having anoscillating member, the said stop device comprising an electricallygrounded rod, a pivoted arm actuated by a sheet of paper passing betweenthe rod and arm, a second Contact arm in enga gement with the pivotedarm when there is a sheet of paper between the rod and said pivoted arm,circuit closing means operated by the oscillating member, a circuitbreaker actuated by the circuit closing means to stop the machine whenthe paper is jamming or the feeding thereof has ceased and means toprevent the stopping of the machine when the paper feeding properly.

7. A stop device for printing and other paper feeding machines having anoscillating member, the said stop device comprising an electricallygrounded rod, a pivoted arm actuated by a sheet of paper passing betweenthe 'rod and arm. a second contact arm in engagcment with the pivotedarm when there is a sheet of paper between the rod and said pivoted arm,circuit closing means operated by the oscillating` member, and a circuitbreaker actuated by the circuit closing means to stop the machine whenthe paper is jamming or the feeding thereof has ceased.

In testimony whereof l have affixed my signature.

RALPH G. HOLT.

